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| Titel |
Experimental Evidence for the Relation between the Geomagnetic Tail Current |
| VerfasserIn |
P. Israelevich, A. Ershkovich |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020645
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| Zusammenfassung |
| We investigated the relationship between the geotail current sheet structure and the anisotropy
of the ion pressure in the plasma sheet using Cluster data. Electric current density distribution
in the geomagnetic tail is shown not to depend on the ratio between the parallel and
perpendicular ion pressure. On the contrary, the tail current sheet bifurcation is
controlled by non-gyrotropicity of plasma pressure. Double-peaked current density
distribution is observed when the ion pressure perpendicular to the magnetic field
exhibits anisotropy. The current sheet splitting is more prominent, and the electric
current density is stronger for larger ratio (T⊥max - T⊥min)/(T⊥max + T⊥min).
Generally, double-peaked current sheets are thinner than single-peaked sheets, and the
current sheet thinning is accompanied by the perpendicular temperature anisotropy. |
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